<4>c语言实现ATM存取款系统（链表）

#include<stdio.h>
#include<String.h>
#include<math.h>
#include<stdlib.h>
#include<windows.h>
#define N 100

struct info {
char account[30];
char user[100];
long dsit;
long pw;
struct info *next;
}bank
;/*
= {
{"2011021232",
"ouyan",
10000,
892968}
};*/

void login();
void regist();
int menu();
int refer();
int deposit();
int withdraw();
int transfer();
int resetPW();
int judgePW(long ps);
int search(char *s,int psw);
int searchAC(char *s);

/*flagI标记当前登录账户，flagN标记当前转账的账户*/
int n = 0;
struct info *pt, *head = NULL, *tail, *p0;

main()
{
int choice = -1;

while(1)
{
printf("               欢迎使用银行存取款系统             \n");
printf("\n         ================================       \n");
printf("           1.登录                                 \n");
printf("           2.注册                                 \n");
printf("           3.退出                                 \n");
printf("\n         ================================       \n");

printf("\t*  请输入您的选择:");
scanf("%d", &choice);
switch(choice)
{
case 1:
system("cls");
login();
break;
case 2:
system("cls");
regist();
break;
case 3:
exit(0);
break;
default:
printf("输入有误，请重输...\n");
break;
}
}
}

////////////////////////////////////登录///////////////////////////////////////////

void login()
{
int i;
int flag;
char my_act[100];
long password;
int X = -1;

printf("\t\t=================****登录****=================\n\n");
printf("\t\t*  输入账户：    ");
scanf("%s", my_act);
printf("\n");
printf("\t\t*  输入密码：    ");
scanf("%ld", &password);
flag = search(my_act,password);
if(flag == 1) {
printf("\t\t登录成功，正在跳转页面...\n");
p0 = pt;
Sleep(2000);
system("cls");
while(1)
{
X = menu();//成功进入
if(X == 1)
{
system("cls");
menu();
}
else
return;
}

}
else if(flag == 0) {
printf("\t\t账号或密码错误，请重新输入...\n");
Sleep(2000);
system("cls");
return;
}
}

int search(char *s,int psw) {
if(head == NULL) {
return 0;
}
pt = head;
while(1) {
if(strcmp(pt->account, s)==0&&pt->pw==psw) {
return 1;
}
if(pt->next == NULL) break;
pt = pt->next;
}
return 0;
}

int searchAC(char *s) {
if(head == NULL) {
return 0;
}
pt = head;
while(1) {
if(strcmp(pt->account, s)==0) {
return 1;
}
if(pt->next == NULL) break;
pt = pt->next;
}
return 0;
}

///////////////////////////////////注册////////////////////////////////////////////
void regist()
{
printf("\t\t=================****注册****=================\n\n");
struct info *p1;
p1 = (struct info*)malloc(sizeof(struct info));
p1->next = NULL;
int flag;

printf("\t\t请输入您的账户....\n");
printf("\t\t");
scanf("%s", p1->account);
printf("\t\t请输入用户名......\n");
printf("\t\t");
scanf("%s", p1->user);
printf("\t\t输入您的密码......\n");
printf("\t\t");
scanf("%ld", &p1->pw);
flag = search(p1->account,p1->pw);
if(flag == 1) {
printf("\t\t账户已存在，请重新注册......\n");
Sleep(2000);
system("cls");
return;

}
else if(flag == 0) {
printf("\t\t注册成功\n");
//flagN = N; //标记当前注册账户是链表中的第几个
p1->dsit = 0;
if(n == 0) {
head = p1;
tail = p1;
n ++;
Sleep(2000);
system("cls");
return;
}
else {
tail->next = p1;
tail = p1;
n ++;
Sleep(2000);
system("cls");
return;
}
}
}

////////////////////////////////主页面////////////////////////////////////////////////

int menu()
{
printf("\t\t=================****主页面****=================\n\n");
printf("\t\t====================****************=================\n\n");
printf("\t\t* 1. 查询                                              \n");
printf("\t\t* 2. 存钱                                              \n");
printf("\t\t* 3. 取钱                                              \n");
printf("\t\t* 4. 转账                                              \n");
printf("\t\t* 5. 修改密码                                          \n");
printf("\t\t* 6. 安全退出                                          \n");
printf("\t\t=====================================================\n\n");

int choice = -1;
int Y = -1;

printf("\t\t *");
printf("我的选择:");
scanf("%d", &choice);
while(1)
{
switch(choice)
{
case 1:
system("cls");
Y = refer();
break;
case 2:
system("cls");
Y = deposit();
break;
case 3:
system("cls");
Y = withdraw();
break;
case 4:
system("cls");
Y = transfer();
break;
case 5:
system("cls");
Y = resetPW();
break;
case 6:
system("cls");
return 0;
default:
printf("输入有误，请重输...\n");
return 1;
}
switch(Y)
{
case 0:
printf("出现错误！\n");
return 0;
break;
case 1:  /*正常情况menu返回1重新进入menu*/
return 1;
break;
case 2:
Y = deposit();
break;
case 3:
Y = withdraw();
break;
case 4:
Y = transfer();
break;
case 5:
Y = resetPW();
break;
}
}
}

/////////////////////////////////////查询///////////////////////////////////////////

int refer()
{
printf("\t\t=================****查询****=================\n\n");
printf("\t\t*  您的账户余额为:\n");
printf("\t\t*  %ld\n", p0->dsit);
Sleep(3000);
system("cls");
return 1;
}

/////////////////////////////////////取款///////////////////////////////////////////

int deposit()
{
long rMoney;
printf("\t\t=================****存款****=================\n\n");
printf("\t\t*  输入您要存入的钱数(整百):\n\n");
printf("\t\t*  ");
scanf("%ld", &rMoney);
if(rMoney%100 != 0)
{
printf("\t\t*  出现错误，请重试...\n\n");
return 2;
}
p0->dsit += rMoney;
printf("\t\t*  存钱成功...\n\n");
Sleep(2000);
system("cls");
return 1;
}

///////////////////////////////////取款///////////////////////////////////////////

int withdraw()
{
long omoney;
printf("\t\t=================****取款****=================\n\n");
printf("\t\t*  输入您要取出的钱数...\n\n");
printf("\t\t*  ");
scanf("%ld", &omoney);
if(omoney%100 != 0)
{
printf("\t\t*  出现错误...\n\n");
Sleep(2000);
system("cls");
return 3;
}
if(omoney > p0->dsit)
{
printf("\t\t*  余额不足...\n\n");
system("cls");
return 1;
}
p0->dsit -= omoney;
printf("\t\t*  取钱成功...\n\n");
Sleep(2000);
system("cls");
return 1;
}

//////////////////////////////////转账/////////////////////////////////////////////

int transfer()
{
struct info *pFlag;
char ob[20];
int key, i;
long money;
int flag;
printf("\t\t=================****转账****=================\n\n");
printf("\t\t*  请输入您要转账的账户...\n");
printf("\t\t*  ");
scanf("%s", ob);
flag = searchAC(ob);
pFlag = pt;
if(flag == 1) {
printf("\t\t*  输入要转出的钱数（整百）：\n");
printf("\t\t*  ");
scanf("%ld", &money);
if(money%100 != 0)
{
printf("\t\t *");
printf("\t\t出现错误，请重试...\n");
Sleep(2000);
system("cls");
return 1;
}
if(money > p0->dsit)
{
printf("\t\t*  余额不足.....\n");
return 1;
}
p0->dsit -= money;
pFlag->dsit += money;
Sleep(2000);
printf("\t\t*  转账成功...");
Sleep(2000);
system("cls");
return 1;
}
else if(flag == 0) {
printf("\t\t*  对不起，您输入的账户不存在...\n");
printf("*****************请稍等*********************");
Sleep(2000);
system("cls");
return 1;

}
}

//////////////////////////////////修改密码////////////////////////////////////////////

int resetPW()
{
long  password1, password2;
long newpassword;
printf("\t\t=================****修改密码****=================\n\n");
printf("\t\t*  请输入原始密码...\n\n");
printf("\t\t*  ");
scanf("%ld", &password1);
printf("\t\t*  请再次输入...\n\n");
printf("\t\t*  ");
scanf("%ld", &password2);
if(p0->pw == password1 && p0->pw == password2)
{
printf("\t\t*  输入新密码...\n\n");
printf("\t\t*  ");
scanf("%ld", &newpassword);
if(judgePW(newpassword) == 1)
{
p0->pw = newpassword;
printf("\t\t*  密码重置成功...\n\n");
Sleep(2000);
system("cls");
return 1;
}
else
{
printf("\t\t*  输入的密码不符合规则，请重试...\n");
Sleep(2000);
system("cls");
return 5;
}

}
else
{
printf("\t\t*  密码错误...\n");
Sleep(2000);
system("cls");
return 1;
}
return 1;
}

//////////////////////////////////////密码判断////////////////////////////////////////

int judgePW(long ps)
{
int n, k;
for(k=0; k<6; k++)
{
n = ps%10;
ps = ps/10;
if(n < 0 || n > 9)
{
return 2;
}
}
return 1;
}